The table shows the postage rates by mass for delivery of parcels.
- How much is the postage if a parcel has a mass of 600 g?
- How much is the postage if a parcel has a mass of 1.3 kg?
(a)
Postage cost of the parcel with a mass of 600 g
= 2.10 + 0.50
= $2.60
(b)
1 kg = 1000 g
1.3 kg = 1.3 x 1000 = 1300 g
Cost for first 550 g = $2.10
Remaining mass
= 1300 - 550
= 750 g
Number of sets of 50 g
= 750 ÷ 50
= 15
Cost for remaining 750 g
= 15 x 0.50
= $7.50
Postage cost of the parcel with a mass of 1.3 kg
= 7.50 + 2.10
= $9.60
Answer(s): (a) $2.60 (b) $9.60